APPLICATIONS OF TECHNOLOGY:

• Greenhouse gas monitoring
• Infrared/surveillance cameras
• Electronic intelligence countermeasures

BENEFITS: 

• Uniform, pinhole-free films
• High quantum efficiency
• High photo detectivity

BACKGROUND:

Black phosphorus (BP)-based optoelectronics have been shown to outperform state-of-the-art commercial devices. BP offers the advantages of high quantum yield, good photostability and size-tunable absorption and emission compared to commercial semiconductor materials. However, the scalability of BP based devices has been limited by current BP deposition and growth techniques. The formulation of a BP based ink is needed for high speed and low cost mass production of BP based optoelectronics.

TECHNOLOGY OVERVIEW:

Researchers at Berkeley lab have developed a black phosphorus (BP) based ink for use in BP based optoelectronics.The development of this BP based ink allows for scalable manufacture of BP based mid-wave infrared (MWIR) optoelectronics such as LEDs and photodetectors. This ink can be spin coated to form uniform pinhole-free films, corresponding to a high quality factor and functional yield.  

Performance metrics achieved in the lab include:

• bP-deposited films with internal photoluminescence yield of ~0.9%
• integration of films in heterostructure devices for both emission and detection, achieving electroluminescence with internal quantum efficiency of ~2.1% and high photoresponsivity of 47 mA/W.

DEVELOPMENT STAGE: 

Proven principle

PRINCIPAL INVESTIGATORS:

Ali Javey

IP STATUS: 

Patent pending

OPPORTUNITIES: 

Available for licensing or collaborative research

FOR MORE INFORMATION: 

Research on Light Emission From Black Phosphorus Hints at New Applications